Expressions used in Everyday Spoken English in Social and Professional contexts
The expression on the up is largely used in the UK and means to improve or to move towards a better state. This expression is a shortened versing of 'on the up and up' meaning to become more successful. Something which is on the increase is becoming greater more common or more frequent. When we talk about something being on the increase it refers to something progressively becoming greater in size amount number or value over time. Something which is on the rise can refer to something becoming more numerous or which is experiencing an increase or becoming more successful.